Abstract
Abstract: Process parameters directly affect the performance and quality of the composite of polypropylene (PP) and kenaf in injection molding. Optimize the parameter of injection molding with the help of response surface methodology (RSM). The important parameters are injection temperature, pressure, and holding time to optimize using the 3-factor, 3-level Box Behnken method. MINITAB 20 is used for statistical analysis of tensile properties of polypropylene and kenaf composite. In this paper the confirmation test is conducted to verify the predicted value of tensile strength and the results show the optimum value for injection temperature is 191.970°C, a pressure value is 40 bar, and the holding time is 13.8384 sec. the optimum parameters are used to manufacture the composite for better tensile strength and actual value of the composite is in the range of the predicted value.
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